1 // Copyright Neil Groves 2009. Use, modification and
2 // distribution is subject to the Boost Software License, Version
3 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
5 //
6 //
7 // For more information, see http://www.boost.org/libs/range/
8 //
9 #ifndef BOOST_RANGE_ALGORITHM_PARTITION__HPP_INCLUDED
10 #define BOOST_RANGE_ALGORITHM_PARTITION__HPP_INCLUDED
11
12 #include <boost/concept_check.hpp>
13 #include <boost/range/begin.hpp>
14 #include <boost/range/end.hpp>
15 #include <boost/range/concepts.hpp>
16 #include <boost/range/detail/range_return.hpp>
17 #include <algorithm>
18
19 namespace boost
20 {
21 namespace range
22 {
23
24 /// \brief template function partition
25 ///
26 /// range-based version of the partition std algorithm
27 ///
28 /// \pre ForwardRange is a model of the ForwardRangeConcept
29 template<class ForwardRange, class UnaryPredicate>
30 inline BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
partition(ForwardRange & rng,UnaryPredicate pred)31 partition(ForwardRange& rng, UnaryPredicate pred)
32 {
33 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
34 return std::partition(boost::begin(rng),boost::end(rng),pred);
35 }
36
37 /// \overload
38 template<class ForwardRange, class UnaryPredicate>
39 inline BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
partition(const ForwardRange & rng,UnaryPredicate pred)40 partition(const ForwardRange& rng, UnaryPredicate pred)
41 {
42 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
43 return std::partition(boost::begin(rng),boost::end(rng),pred);
44 }
45
46 // range_return overloads
47
48 /// \overload
49 template< range_return_value re, class ForwardRange,
50 class UnaryPredicate >
51 inline BOOST_DEDUCED_TYPENAME range_return<ForwardRange,re>::type
partition(ForwardRange & rng,UnaryPredicate pred)52 partition(ForwardRange& rng, UnaryPredicate pred)
53 {
54 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
55 return boost::range_return<ForwardRange,re>::
56 pack(std::partition(boost::begin(rng), boost::end(rng), pred), rng);
57 }
58
59 /// \overload
60 template< range_return_value re, class ForwardRange,
61 class UnaryPredicate >
62 inline BOOST_DEDUCED_TYPENAME range_return<const ForwardRange,re>::type
partition(const ForwardRange & rng,UnaryPredicate pred)63 partition(const ForwardRange& rng, UnaryPredicate pred)
64 {
65 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
66 return boost::range_return<const ForwardRange,re>::
67 pack(std::partition(boost::begin(rng), boost::end(rng), pred), rng);
68 }
69
70 } // namespace range
71 using range::partition;
72 } // namespace boost
73
74 #endif // include guard
75